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TweezerComm is a secure and efficient payment communication protocol that enables seamless integration between client applications and Nayax attended payment devices. It allows point-of-sale (POS) systems, electronic cash registers (ECRs), and other payment-enabled applications to process transactions securely over a structured JSON-RPC interface. It enables client applications to communicate with the Agamento payment application (which runs on a Nayax attended terminal), the central unit for transaction processing. Communication should be over a local network such as HTTPS (the best practice), HTTP, BT or USB connection, allowing you to:
  • Initiate and manage transactions.
  • Retrieve and process transaction data.
  • Handle settlements, refunds, and pre-authorizations.

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Payment services

Nayax’s TweezerComm protocol supports two primary payment services, one for global users and one exclusive to Israel.
  • Global Payments: The Engine Service is the primary service for processing credit card and closed-loop transactions with the Nayax Gateway. The Nayax Gateway is responsible for setting device parameters and processing transactions according to the settings configured in Nayax Core. This service is widely used, supporting many payment providers in numerous countries. Before a transaction can be executed, the device must complete an “establishment” process (managed by Nayax’s team).
  • Israel Payments: The Ashrait Service is a specialized service for performing AshraitEMV transactions. The client application communicates with the AshraitEMV Application (AEA), which can run on a stand-alone terminal or a central server. All approved transactions are written to the AEA’s database. A key part of this service is the batch process, where the AEA transmits approved transactions to the ABS (SHVA) server.
The sections below list the relevant guides for each payment service.

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Global TweezerComm guides

This section provides guides to assist you in using TweezerComm with the Nayax global payment service, outlining the integration process and available API methods. See the pages below to learn more:

Get started

See how TweezerComm structures and sends requests using JSON-RPC 2.0.

Global payment flows

Follow the structured payment flows for global transaction processing.

Global payment methods

Browse the API methods for the global engine payment service.

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Israel TweezerComm guides

This section provides guides to assist you in using TweezerComm with the Nayax Israel payment service, outlining the integration process and available API methods. See the pages below to learn more:

Get started

See how TweezerComm structures and sends requests using JSON-RPC 2.0.

Israel payment flows

Follow the structured payment flows for Israel transaction processing.

Israel payment methods

Browse the API methods for the Israel ashrait payment service.

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General guides

This section provides general guides that are relevant to TweezerComm’s payment services. See the pages below to learn more:

Device methods

Manage payment terminals: device info, card reads, configuration, and diagnostics.

TC service

Run the Agamento app as a background service for your own Android app.

Resilience mechanism

Handle transaction completion or cancellation when errors or failures occur.

Additional resources

Find certification files, error codes, and other supporting materials.